Initial dract of the common structs

common/tx.go

@@ -0,0 +1,42 @@
+package common
+
+import (
+	"math/big"
+
+	eth "github.com/ethereum/go-ethereum/common"
+)
+
+// Tx is a struct that represents a Hermez network transaction
+type Tx struct {
+	ID          TxID
+	FromEthAddr eth.Address
+	ToEthAddr   eth.Address
+	FromIdx     uint32
+	ToIdx       uint32
+	TokenID     TokenID
+	Amount      *big.Int
+	Nonce       uint64 // effective 48 bits used
+	FeeSelector FeeSelector
+	Type        TxType // optional, descrives which kind of tx it's
+}
+
+// TxID is the identifier of a Hermez network transaction
+type TxID Hash // Hash is a guess
+
+// TxType is a string that represents the type of a Hermez network transaction
+type TxType string
+
+const (
+	// Exit represents L2->L1 token transfer.  A leaf for this account appears in the exit tree of the block
+	Exit TxType = "Exit"
+	// Withdrawn represents the balance that was moved from L2->L1 has been widthrawn from the smart contract
+	Withdrawn TxType = "Withdrawn"
+	// Transfer represents L2->L2 token transfer
+	Transfer TxType = "Transfer"
+	// Deposit represents L1->L2 transfer
+	Deposit TxType = "Deposit"
+	// CreateAccountDeposit represents creation of a new leaf in the state tree (newAcconut) + L1->L2 transfer
+	CreateAccountDeposit TxType = "CreateAccountDeposit"
+	// CreateAccountDepositTransfer represents L1->L2 transfer + L2->L2 transfer
+	CreateAccountDepositTransfer TxType = "CreateAccountDepositTransfer"
+)